PEG-15 Butylene Glycol Diisostearate

PEG-15 Butylene Glycol Diisostearate 1
PEG-15 Butylene Glycol Diisostearate 2
PEG-15 Butylene Glycol Diisostearate 3
AKA: Polyethylene Glycol 15 Butylene Glycol Diisostearate, Emollient
Plant-Derived
Cleanser
Emulsifier
Not Clean
PEG-15 Butylene Glycol Diisostearate is the polyethylene glycol derivative of the diester of Butylene Glycol and Isostearic Acid containing an average of 15 moles of ethylene oxide.
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing Surfactant
Emulsifier
Removes Impurities
Mixes Oil & Water
Traditional Use
A synthetic emulsifier combining PEG, butylene glycol, and isostearate chemistry developed in late-20th-century cosmetics. Formulated to provide elegant emulsions with improved skin conditioning.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR